255829-29-9Relevant articles and documents
Regulation of peripheral tert-butyl position: Approaching efficient blue OLEDs based on solution-processable hole-transporting materials
Wu, Sen,Liu, Hongli,Sun, Wei,Li, Xianggao,Wang, Shirong
, p. 85 - 92 (2019)
Solution-processable hole transporting materials (HTMs)play a vital role in organic light emitting diodes (OLEDs)with the purpose of reducing costs and improving productivity. Herein, two twisted HTMs N2,N2,N7,N7-tetrakis(4-(3,6-di-tert-butyl-9H- carbazol-9-yl)phenyl)-9,9-dimethyl-9H-fluoren-2,7-diamine (p-BCz-F)and N2,N2,N7, N7-tetrakis(4-(2,7-di-tert-butyl-9H-carbazol-9-yl)phenyl)-9,9-dimethyl-9H-fluoren-2,7-diamine (m-BCz-F), have been successfully synthesized. The two compounds are endowed with superior solubility in common organic solvents, facilitating solution-processed OLEDs. By simply changing position of peripheral tert-butyl moiety, the material performance could be regulated. The HTMs p-BCz-F exhibits superior glass transition temperature (Tg)of 168 °C. Particularly, in terms of mobility, 1.42-fold higher could be also found for p-BCz-F (4.35 × 10?4 cm2V– 1S?1)than m-BCz-F (3.05 × 10?4 cm2V– 1S?1). Similarly, the p-BCz-F-based blue devices with BCzVBi as the emitter show better performance with maximum current efficiency (CE)of 7.05 cd/A and luminance (L)of 23365 cd/m2, corresponding CE of 6.12 cd/A and L of 21055 cd/m2 for m-BCz-F-based devices. In short, the different position of peripheral tert-butyl on carbazolyl moiety will lead to different performance and it provided a simple strategy to design solution-processable HTMs for efficient OLEDs.
New dendritic gelator bearing carbazole in each branching unit: Selected response to fluoride ion in gel phase
Xu, Defang,Liu, Xingliang,Lu, Ran,Xue, Pengchong,Zhang, Xiaofei,Zhou, Huipeng,Jia, Junhui
, p. 1523 - 1528 (2011)
A new dendritic gelator with carbazole as the building block (HBCD) was synthesized. It was found that H-bonding between the amide groups and π-π interaction between the aromatic rings played predominant roles in the gel formation. Meanwhile, significant
Soluble triarylamine functionalized symmetric viologen for all-solid-state electrochromic supercapacitors
Zhuang, Yanling,Zhao, Weiwei,Wang, Longlu,Li, Feiyang,Wang, Weikang,Liu, Shujuan,Huang, Wei,Zhao, Qiang
, p. 1632 - 1644 (2020/08/21)
Electrochromic supercapacitors have drawn enormous attention due to their ability to monitor the charge and discharge processes through color changes of electroactive materials. However, there are few work on small organic molecules as active materials fo
Efficient and straightforward click synthesis of structurally related dendritic triazoles
Mangione,Spanevello,Anzardi
, p. 47681 - 47688 (2017/10/23)
A simple, rapid and efficient copper-catalyzed 1,3-dipolar cycloaddition reaction is described for the synthesis of a novel family of twelve triazolic dendrimers structurally related. The products were the result of the click reaction of three cores and four different azides in tetrahydrofuran applying a homogeneous copper catalysis. The reaction intermediates and products were obtained in very good to excellent yields using straightforward and simple work-up procedures. This new family of compounds contain electroactive moieties such as carbazole and triphenylamine which may turn them into excellent candidates for the development of optoelectronic organic materials.
